GB1438736A - Magnetic materials - Google Patents
Magnetic materialsInfo
- Publication number
- GB1438736A GB1438736A GB3272474A GB3272474A GB1438736A GB 1438736 A GB1438736 A GB 1438736A GB 3272474 A GB3272474 A GB 3272474A GB 3272474 A GB3272474 A GB 3272474A GB 1438736 A GB1438736 A GB 1438736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- july
- hydrogen peroxide
- peroxide solution
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000696 magnetic material Substances 0.000 title 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 abstract 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 abstract 2
- 229910000423 chromium oxide Inorganic materials 0.000 abstract 2
- 229940117975 chromium trioxide Drugs 0.000 abstract 2
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 abstract 2
- 230000005294 ferromagnetic effect Effects 0.000 abstract 2
- 229910052787 antimony Inorganic materials 0.000 abstract 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000010348 incorporation Methods 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 229910052714 tellurium Inorganic materials 0.000 abstract 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70636—CrO2
Landscapes
- Hard Magnetic Materials (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8340873A JPS5318196B2 (enrdf_load_stackoverflow) | 1973-07-24 | 1973-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1438736A true GB1438736A (en) | 1976-06-09 |
Family
ID=13801591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3272474A Expired GB1438736A (en) | 1973-07-24 | 1974-07-24 | Magnetic materials |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3956151A (enrdf_load_stackoverflow) |
| JP (1) | JPS5318196B2 (enrdf_load_stackoverflow) |
| CA (1) | CA1046239A (enrdf_load_stackoverflow) |
| DE (1) | DE2435874C3 (enrdf_load_stackoverflow) |
| FR (1) | FR2238671B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1438736A (enrdf_load_stackoverflow) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1516774A (en) * | 1975-10-10 | 1978-07-05 | Anvar | Process for preparing chromium dioxide |
| GB8718010D0 (en) * | 1986-08-21 | 1987-09-03 | Ici Plc | Surface treatment for recording media |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2923685A (en) * | 1958-08-21 | 1960-02-02 | Du Pont | Alkali metal modified ferromagnetic chromium oxide, its preparation and use as the magnetic material of recording members |
| US3243260A (en) * | 1961-06-12 | 1966-03-29 | Matsushita Electric Ind Co Ltd | Method for preparing cro2 of rutile type crystalline structure |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
| US3493338A (en) * | 1966-09-28 | 1970-02-03 | Du Pont | Process for preparing ferromagnetic materials |
| US3486851A (en) * | 1967-03-01 | 1969-12-30 | Du Pont | Formation of ferromagnetic cro2 by decomposition of higher valent chromium oxides |
-
1973
- 1973-07-24 JP JP8340873A patent/JPS5318196B2/ja not_active Expired
-
1974
- 1974-07-18 CA CA205,004A patent/CA1046239A/en not_active Expired
- 1974-07-22 US US05/490,703 patent/US3956151A/en not_active Expired - Lifetime
- 1974-07-23 DE DE2435874A patent/DE2435874C3/de not_active Expired
- 1974-07-23 FR FR7425516A patent/FR2238671B1/fr not_active Expired
- 1974-07-24 GB GB3272474A patent/GB1438736A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3956151A (en) | 1976-05-11 |
| DE2435874B2 (de) | 1977-12-15 |
| JPS5318196B2 (enrdf_load_stackoverflow) | 1978-06-13 |
| FR2238671A1 (enrdf_load_stackoverflow) | 1975-02-21 |
| CA1046239A (en) | 1979-01-16 |
| FR2238671B1 (enrdf_load_stackoverflow) | 1976-10-22 |
| DE2435874A1 (de) | 1975-02-06 |
| JPS5032097A (enrdf_load_stackoverflow) | 1975-03-28 |
| DE2435874C3 (de) | 1978-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19940723 |